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ABCD is a cyclic trapezium whose sides AD and BC are parallel to each other .If angle ABC = 72 degree then what is the measure of the angle BCD .
12 years ago

Answers

Reiny
In a cylic quad, opposite angles are supplementary, so
angle D = 108°

but since AD || BC, angle C + angle D i= 180° as well
so angle C = 72°
12 years ago

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